JP5458376B2 - High shear method using high shear device - Google Patents

Description

  The present invention is applied to disperse and mix the internal structure of materials at a nano level by high shearing the materials of incompatible polymer blend system, polymer / filler system, and polymer blend / filler system. The present invention relates to a high shear method using a high shear device.

Conventionally, polymer blend extrudates having a dispersed phase of several tens of nanometers can be produced without adding extra additives such as compatibilizers in blend systems that are incompatible with each other (incompatible) at rest. There is known a high shearing machine (see, for example, Patent Document 1).
In Patent Document 1, a high shearing machine equipped with an internal feedback screw is used to knead a few minutes of a polymer blend trace sample of 2 to 5 g in a molten state at a high speed of, for example, 500 to 3000 rpm in a molten state for several minutes. Thus, a structure for producing a polymer blend extrudate (blend material) excellent in heat resistance, mechanical properties, dimensional stability and the like by being nano-dispersed is disclosed.

JP-A-2005-313608

However, the conventional method for producing a blend material using a high shear machine (high shear part) has the following problems.
That is, in a high shearing machine (high shearing part) as in Patent Document 1, as a procedure for starting high shear by rotating the internal feedback screw at high speed, first, a resin melted while rotating the internal feedback screw at medium speed Is injected into the heating cylinder, and the groove of the internal feedback screw is filled with a specified amount of resin, and then the internal feedback screw is switched to high speed rotation to perform high shear.
However, when the filling of the resin into the heating cylinder is completed, if the resin is not densely filled in the front part of the internal feedback screw, or the resin is uniformly distributed over the entire axial direction of the internal feedback screw. It may not be filled. In such a case, the material is kneaded in a non-uniform state immediately after the start of high shear by rotating the internal feedback screw at high speed, the pressure waveform of the material in the heating cylinder, the torque of the internal feedback screw motor, etc. As a result, the quality of the blended material to be produced is degraded. Therefore, a suitable method for kneading the material while stabilizing the above behavior during high shear is required, and there is room for improvement in that respect.

  The present invention has been made in view of the above-described problems, and is capable of producing a high-quality blend material by kneading the material by stabilizing the behavior of the material such as the pressure waveform during high shear. An object is to provide an apparatus.

In order to achieve the above object, in the high shear method using the high shear device according to the present invention, kneading is performed while applying a high shear stress, so that an incompatible polymer blend system, a polymer / filler system, and further a polymer blend are used. / High shear method using a high shear device that disperses and mixes the internal structure of filler materials at the nano level, and in the plasticizing part for plasticizing and melting the material, the molten material is subjected to high shear A step of injecting into a heating cylinder of a high shearing section provided with a screw, and a rotation side of the high shearing screw by low-speed rotation after the injection process to feed the material in the heating cylinder for a predetermined time. a step of increasing the high shear screw front material pressure and transferred to, after said transfer step, the high from the low speed to the high shear screw It is characterized in that by high speed rotation of a step of kneading giving high shear stress on the material.

In the present invention, the material melted in the plasticizing part is injected into the heating cylinder of the high shear part, and after completion of the resin injection, the high shear screw is rotated at a low speed (for example, about 100 to 500 rpm). The material pressure in front of the screw can be increased by providing a step of transferring the material filled in the groove of the high shear screw to the feed side (forward) of the high shear screw. In other words, when high shear is performed by switching the rotational speed of the high shear screw from low speed to high speed, the material pressure in front of the screw is increased at the start of the high shear, so the rotation of the high shear screw immediately after the start of high shear. At the same time, the material distribution in the heating cylinder is kneaded in a stable state. Therefore, the behavior such as the pressure waveform and the torque of the high shear screw motor can be stabilized, and the material can be nano-dispersed by high shear.

  According to the high shear method using the high shear device according to the present invention, since the material pressure in front of the high shear screw is increased at the start of the high shear, the inside of the heating cylinder kneaded with the rotation of the high shear screw It is possible to stabilize the material distribution immediately after the start of high shearing, that is, the behavior of the material such as the pressure waveform can be stabilized. Therefore, the injected material can be nano-dispersed efficiently by high shear, and a transparent high-quality blend material can be produced.

It is a partially broken top view which shows schematic structure of the high shear device by embodiment of this invention. It is a partially broken side view which shows the detailed structure of a high shear device. It is a partially broken side view which shows the structure of a high shear unit. FIG. 3 is an enlarged view of the high shear screw shown in FIG. 2. It is a figure which shows the state of the molten resin inject | poured into the high shear unit, Comprising: (a) is a sectional side view which shows the state before inject | pouring molten resin to a high shear unit, and (b) is the state after transfer FIG. 5 is a side cross-sectional view showing the respective parts corresponding to FIG. 4. This is a high shear flow using a high shear device. It is a figure which shows the various behavior obtained by the high shearing apparatus by an Example.

  Hereinafter, an embodiment of a high shear method using the high shear device of the present invention will be described with reference to FIGS.

  Reference numeral 1 in FIG. 1 indicates a high shear device according to the present embodiment. The high shear device 1 is made by kneading an incompatible polymer blend system, a polymer / filler system, or a polymer blend / filler system material (hereinafter simply referred to as “resin M”) while applying a high shear stress. The internal structure of the resin M is dispersed and mixed at the nano level to produce a polymer blend resin in a molten state.

As shown in FIG. 1 and FIG. 2, the high shear device 1 includes a plasticizing unit 10 (plasticizing part) for plasticizing and melting a solid polymer blend resin M, and plasticizing by the plasticizing unit 10. The melted resin M ′ is injected from the injection part 22 and the internal feedback screw 23 (high shear screw) inserted in the heating cylinder 21 is rotated at a rotational speed of, for example, 100 to 3000 rpm to knead the molten resin M ′. Thus, the high shear unit 20 (high shear part) that nano-disperses the molten resin M ′ by performing high shearing.
In addition, the high shear device 1 shown in FIG. 1 is a view in which a part (a plasticizing screw 12 portion to be described later) is broken, and a hopper 14 and a hopper base 17 to be described later are viewed from the side for easy viewing. It has become.

  Here, in the following description, the screw feed sides in the axial directions of the plasticizing screw 12 and the internal feedback screw 23 in the plasticizing unit 10 and the high shear unit 20 are “front”, “front end”, and “tip”. The opposite side is used as “rear”, “rear end”, and “base end”. Similarly, in the heating cylinder 11 of the plasticizing unit 10 and the heating cylinder 21 of the high shear unit 20 which will be described later, the feed sides of the screws 12 and 23 inserted through the heating cylinder 11 are respectively “front”, “front end”, and “tip”. The opposite side is used as “rear”, “rear end”, and “base end”. In the following description, the resin M before being plasticized by the plasticizing unit 10 is simply referred to as a resin M, and a molten resin M ′ is used to distinguish the plasticized resin.

  As shown in FIG. 2, the plasticizing unit 10 includes a plasticizing screw 12 for kneading the resin M to plasticize and melt it, and the plasticizing screw 12 is arranged with the rotation axis direction substantially horizontal. ing. On the other hand, the high shear unit 20 includes the internal feedback screw 23 for applying high shear to the molten resin M ′ injected from the plasticizing unit 10, and the internal feedback screw 23 plasticizes the rotation axis direction. It arrange | positions toward the substantially horizontal direction orthogonal to the rotating shaft direction of the plasticizing screw 12. As shown in FIG.

  Here, examples of the material system to be used in the high shear device 1 include incompatible polymer blend systems, polymer / filler systems, and polymer blend / filler systems. For example, the incompatible polymer blend system includes a combination of polyvinylidene fluoride (PVDF) and polyamide 11 (PA11), and a combination of polycarbonate (PC) and polymethyl methacrylate (PMMA). Examples of the polymer / filler system include a combination of polylactic acid and carbon nanotube (CNT), and examples of the polymer blend / filler system include a combination of PVDF, polyamide 6, and CNT.

  A plasticizing unit 10 shown in FIG. 1 has a substantially hollow cylindrical heating cylinder 11 arranged in a substantially horizontal direction, and is rotatable in the circumferential direction and reciprocally movable in the axial direction while being inserted into the heating cylinder 11. A plasticizing screw 12, and a drive unit 13 that is disposed on the base end 12a side that is one end side in the axial direction of the plasticizing screw 12 and that causes the plasticizing screw 12 to rotate and reciprocate in the axial direction. The hopper 14 for supplying the solid resin M to the base end portion 12a of the plasticizing screw 12 and the injection nozzle 15 provided on the tip end portion 12b side forming the other axial end of the plasticizing screw 12 are provided. It is roughly structured.

  The heating cylinder 11 of the plasticizing unit 10 is held in a state in which the longitudinal direction is substantially horizontal, and the outer peripheral surface is covered with a plurality of heaters 16, 16... The temperature can be adjusted.

  A hopper base 17 having an insertion hole 17a for supporting the hopper 14 and dropping the solid resin M supplied to the hopper 14 to the base end 12a side of the plasticizing screw 12 is provided at the base end 11a of the heating cylinder 11. It is fixed. An injection nozzle 15 is attached to the inner surface of the tip 11b of the heating cylinder 11 in a state where the flow path (injection port 15a) communicates with the inner space (plasticization region R) of the heating cylinder 11. . The temperature of the heating cylinder 11 is controlled by a temperature sensor 18 shown in FIG.

  The plasticizing screw 12 is arranged substantially coaxially with the heating cylinder 11 so that the resin temperature kneaded in the screw by the heating cylinder 11 is adjusted. Further, the base end portion 12a of the plasticizing screw 12 reaches the insertion hole 17a of the hopper base 17 and is connected to a screw rotating shaft 133 of the driving unit 13 described later so as to be in a straight line.

The drive unit 13 includes a rotation mechanism 13A that rotates the plasticizing screw 12, and an injection mechanism 13B that reciprocates the plasticizing screw 12 in the axial direction to inject the molten resin in the screw 12 from the injection nozzle 15. Become.
The rotation mechanism 13 </ b> A includes a screw rotation motor 132 fixed on the fixing portion 131, and a screw rotation shaft 133 to which the rotational force is transmitted by the screw rotation motor 132. The screw rotating shaft 133 and the base end portion 12 a of the plasticizing screw 12 are connected in a straight line by a connecting piece 134.

  The injection mechanism 13B includes a ball screw 135 that is fixed to the fixing portion 131 with a screw shaft arranged parallel to the axial direction of the plasticizing screw 12, and a nut 136 that is rotatably engaged with the ball screw 135. The injection motor 137 is configured to transmit the rotational force to the nut 136 and to be separated from the fixed portion 131. The ball screw 135 reciprocates with respect to the nut 136 that is rotated by the drive of the injection motor 137, whereby the fixing portion 131 that fixes the ball screw 135, the screw rotation motor 132 on the fixing portion 131, screw rotation, and the like. The plasticizing screw 12 provided via the shaft 133 is configured to reciprocate in the axial direction. That is, the plasticizing screw 12 has a function of mixing and melting the solid resin M by rotation and injecting the molten resin plasticized in the heating cylinder 11 from the injection nozzle 15 by rotation and reciprocation. Yes.

Next, the configuration of the high shear unit 20 for supplying the molten resin M ′ melted by the plasticizing unit 10 and high shearing the molten resin M ′ will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the high shear unit 20 includes a hollow cylindrical heating cylinder 21 that has an injection portion 22 for injecting resin and is arranged in a substantially horizontal direction, and is inserted into the heating cylinder 21. An internal feedback screw 23 that is rotatable in the circumferential direction in a state where it is placed, and a shaft 25 that is disposed behind the internal feedback screw 23 (that is, on the base end portion 23b side that is one end side in the screw axial direction). A drive motor 24 for rotating the internal feedback screw 23 via the bearing, a swing support 27 for rotatably supporting the shaft 25 via the bearing 26, and the other axial end side of the internal feedback screw 23. And a tip holding portion 28 having a T-die 29 that forms a forming portion provided on the tip side of the head.

  As shown in FIGS. 2 and 3, the heating cylinder 21 of the high shear unit 20 is held with its longitudinal direction oriented in a substantially horizontal direction, covered with a heater 38, and can be adjusted in temperature. The heating cylinder 21 has a base end portion 21b (left side in FIG. 2) supported by a main body support portion 30, and the tip end holding portion 28 is provided at the tip end portion 21a. As shown in FIGS. 2 and 4, the injection portion 22 provided in the heating cylinder 21 is formed with an injection passage 22a communicating with the inner space (high shear region K), and the outer periphery of the injection passage 22a. The side opening is configured to engage with the injection port 15a of the injection nozzle 15 described above so as to coincide with each other. As a result, the molten resin M ′ injected by the plasticizing unit 10 can flow into the high shear region K (the gap between the heating cylinder 21 and the internal feedback screw 23) from the injection portion 22.

Here, the position of the injection path 22 a formed in the injection portion 22 is a position closer to the front end than the discharge port (described later) of the feedback hole 231 provided near the rear end of the internal feedback screw 23. Yes.
In the middle of the injection path 22 a, an injection valve 31 capable of opening / closing control for adjusting the inflow amount of the molten resin M ′ from the plasticizing unit 10 is provided in the inner space of the heating cylinder 21. The injection valve 31 is an automatic opening / closing type capable of controlling the injection amount according to a preset time or the like, and can be interlocked with an opening / closing operation of a discharge valve 32 described later.

  Further, as shown in FIG. 3, resin pressure sensors 33 (33 </ b> A, 33 </ b> B) for detecting the resin pressure at the front and rear positions in the axial direction of the internal feedback screw 23 are embedded in the heating cylinder 21. ing. That is, the detection parts of the front resin pressure sensor 33A and the rear resin pressure sensor 33B are arranged in contact with the high shear region K in the heating cylinder 21 (see FIG. 1). The front resin pressure sensor 33A is a position where the resin pressure near the front end 23a (near the inlet 231a) of the internal feedback screw 23 can be detected, and the rear resin pressure sensor 33B is formed on the internal feedback screw 23. The resin pressure in the vicinity of the discharge port 231b (see FIG. 4) of the return hole 231 can be detected. The front resin pressure and the rear resin pressure detected by both the resin pressure sensors 33A and 33B are managed when performing high shearing, and details will be described later.

  As shown in FIG. 2, the internal feedback screw 23 is rotatably provided in a state where the internal feedback screw 23 is inserted substantially coaxially in the heating cylinder 21, and a shaft 25 whose base end portion 23 b is connected to the rotation shaft of the drive motor 24. Are connected so as to be in a straight line, and the rotational force of the drive motor 24 is transmitted. The base end portion 23 b of the internal feedback screw 23 is located outside the range of the high shear region K where no screw blades are formed, and can slide in a liquid-tight manner with respect to the inner surface of the heating cylinder 21. .

  Further, as shown in FIG. 4, the internal feedback screw 23 is formed with a feedback hole 231 along the screw central axis from the front end portion 23a toward the rear end side as described above. The return hole 231 has an inflow port 231a at one end positioned substantially at the center of the cross section of the screw front end 23a, extends from the inflow port 231a to the rear end side, and changes its direction in the radial direction of the screw 23 at a predetermined position. The other end which becomes the discharge outlet 231b is provided in the position of the outer peripheral surface.

  In the return hole 231, the inflow port 231 a is on the upstream side of the molten resin M ′ flowing in the return hole 231 during high shear, and the discharge port 231 b is on the downstream side. That is, the molten resin M ′ injected into the high shear region K is sent to the tip side with the rotation of the internal feedback screw 23, flows into the feedback hole 231 from the inflow port 231a, flows backward, and is discharged from the discharge port 231b. Then, the circulation is again sent to the tip side along with the rotation of the internal feedback screw 23. By this circulation, the molten resin M ′ is nano-dispersed and its internal structure is dispersed and mixed at the nano level.

  Moreover, as shown in FIG. 3, the temperature sensor 34 (34A-34D) is provided in the heating cylinder 21 and the front-end | tip holding | maintenance part 28 in the appropriate position, and the heating cylinder 21 and the front-end | tip holding | maintenance part 28 at the time of high shear are provided. The temperature is controlled, and the temperature can be adjusted by a heater 38 provided in the heating cylinder 21.

  As shown in FIG. 2, a discharge passage 29 a communicating with the inner space (high shear region K) of the heating cylinder 21 is formed in the tip holding portion 28, and downward on the discharge side of the discharge passage 29 a. A T-die 29 is formed which forms a forming portion whose opening cross section increases in diameter. A discharge valve 32 for adjusting the discharge amount of the nano-dispersed resin discharged from the high shear region K is provided in the discharge path 29a. The discharge valve 32 is an automatic opening / closing type capable of controlling the discharge amount in accordance with a preset high shear kneading time or the like, and is interlocked with the opening / closing operation of the injection valve 31 described above. That is, the injection valve 31 and the discharge valve 32 described above can control injection (injection by the plasticizing unit 10) and discharge at an arbitrary timing.

Next, a method of dispersing and mixing the internal structure of the resin M made of an incompatible polymer blend system, polymer / filler system, or polymer blend / filler system material at the nano level using the high shear device 1 described above. Will be described with reference to the manufacturing flow of FIG.
In the high shear device 1, the polymer blend-based solid resin M is a resin in which two or more kinds are mixed as described above.

In the high shear device 1, a step of injecting the molten resin M ′ melted in the plasticizing section into the heating cylinder 21 of the high shear unit 20 and rotating the internal feedback screw 23 by low-speed rotation for a predetermined time after the injection step. The resin M in the heating cylinder 21 is transferred to the feed side (front) of the internal feedback screw 23, and after the transfer process, the internal feedback screw 23 is rotated at a high speed to apply high shear stress to the resin M. High shear can be performed by the step of applying and kneading.

  First, as shown in FIGS. 1, 2, and 4, in a plasticizing unit 10 that is attached to the high shear unit 20 in an injectable state, the solid resin M is plasticized to obtain a molten resin M ′. Is made. In this case, the resin M is supplied from the hopper 14 to the plasticizing screw 12 in the heating cylinder 11 serving as the plasticizing region R, and the screw rotating motor 132 of the rotating mechanism 13A is driven, so that the plasticizing screw 12 has an appropriate rotation speed. Rotate with The heating cylinder 11 is heated to an appropriate temperature by the heater 16 wound around the outer periphery, that is, a temperature corresponding to the higher melting temperature of the two materials. As a result, the resin M in the plasticized region R is plasticized and melted and kneaded to become a molten resin M ′. That is, the plasticization of the resin in the plasticizing region R of the plasticizing unit 10 is completed.

Next, the molten resin in the plasticizing unit 10 is injected into the heating cylinder 21 of the high shear unit 20 (steps S1 and S2 shown in FIG. 6).
Specifically, when the molten resin M ′ is obtained with desired properties, the injection valve 31 of the high shear unit 20 is opened to open the injection path 22a, and the discharge valve 32 is closed (step S1).
Next, the internal feedback screw 23 of the high shear unit 20 is rotated at a low speed ( for example, 100 to 500 rpm), and the molten resin M ′ is injected from the plasticizing unit 10 to enter the heating cylinder 21 of the high shear unit 20. Injecting (step S2).
Then, when a predetermined amount of molten resin M ′ is injected from the plasticizing unit 10, the injection valve 31 is closed (step S3).

Subsequently, after the injection of the molten resin M ′ is completed (FIG. 5A), in step S4, the internal feedback screw 23 is rotated at the above-described medium speed rotation for a predetermined time of about 2 to 3 seconds, for example. Then, the resin M in the heating cylinder 21 is transferred in front of the internal feedback screw 23 (in the direction of arrow F) (FIG. 5B).
That is, as shown in FIGS. 5 (a) and 5 (b), the molten resin M ′ accumulated in the screw groove is fed forward of the screw (in the direction of arrow F), and a solid state is obtained in the front area (symbol s). By doing so, the resin pressure ahead of the internal feedback screw 23 is increased.

Next, in steps S5 and S6, after the resin transfer step in step S4, the rotational speed of the internal feedback screw 23 is switched from a low speed to a high speed (for example, 500 to 3000 rpm) while the resin pressure in front of the screw is high. (Step S5) High shear is performed on the molten resin M ′ in the high shear region K for a predetermined set time (Step S6).
At this time, the molten resin M ′ injected into the high shear region K is sent to the distal end side along with the high-speed rotation of the screw 23 on the outer peripheral side of the internal feedback screw 23, and the inlet of the feedback hole 231 at the screw distal end portion 23 a. A high shear stress is applied to the molten resin M ′ by repeating the circulation that flows backward from the nozzle 231a, returns to the outer periphery of the screw from the discharge port 231b, returns, and is sent to the tip again. ing.

Further, when performing high shear switch the rotational speed of the internal-feedback screw 23 to the low-speed rotation or al high-speed rotation, the resin pressure of the screw forward to the high shear at the start is increased, internal feedback immediately after the start high shear As the mold screw 23 rotates, the resin distribution in the heating cylinder 21 is kneaded in a stable state. Therefore, the behavior such as the pressure waveform and the torque of the drive motor 24 for the internal feedback screw 23 can be stabilized, and the molten resin M ′ can be nano-dispersed by high shear.

Next, when the production of the molten resin is completed in the plasticizing unit 10, the rotation speed of the internal feedback screw 23 is switched from a high speed to a low speed ( for example, 100 to 500 rpm) (step S7), and the discharge valve 32 is opened. The discharge path 29a is opened (step S8), and the transparent polymer blend extrudate (blend material) produced by high shear is discharged from the T-die 29 through the discharge path 29a (step S9), once. Completes the high shear cycle.

  As described above, in the high shear method using the high shear device according to the present embodiment, the resin pressure ahead of the internal feedback screw 23 is increased at the start of the high shear, so the internal feedback screw 23. It is possible to stabilize the distribution of the molten resin M ′ in the heating cylinder 21 kneaded with the rotation of the motor immediately after the start of the high shear, that is, the pressure waveform of the resin and the motor for the high shear screw (the driving shown in FIGS. 1 and 3). The behavior of the motor 24) such as torque can be stabilized. Therefore, the injected resin can be nano-dispersed efficiently by high shear, and a transparent high quality blend material can be produced.

Next, an example for supporting the effect of the high shear method using the high shear device according to the above-described embodiment will be described below with reference to FIG.
In this example, a resin M made of an incompatible polymer blend system, a polymer / filler system, or a polymer blend / filler system material is subjected to high shear using the high shear device 1 shown in FIG. 1 to produce a blend material. did.

FIG. 7 shows various behaviors obtained by the high shear device 1 in the process from the injection of the molten resin to the production of the blend material in one high shear cycle, that is, in steps S1 to S9 described above.
In FIG. 7, the waveform P <b> 1 is the number of rotations of the internal feedback screw 23 shown in FIG. 3, and the waveform P <b> 2 is the resin detected by the temperature sensor 34 </ b> B provided at the tip of the heating cylinder 21 of the high shear unit 20. Temperature, the waveform indicated by P3 is the screw torque of the drive motor 24 of the internal feedback screw 23, and the waveforms indicated by P4 and P5 are the front resin pressure and the rear resin pressure sensor 33B detected by the front resin pressure sensor 33A, respectively. It is the rear resin pressure detected in the above.

As shown in FIGS. 1 to 4, in this embodiment, at the time of resin injection in steps S1 and S2 shown in FIG. 6, the internal feedback screw 23 is rotated at a rotational speed ( low speed rotation ) of 100 to 500 rpm, and plasticization is performed. By injecting the molten resin M ′ produced by the conversion unit 10 into the heating cylinder 21 of the high shear unit 20, the numerical values of the torque P3 and the front resin pressure P4 are increased. Then, after the resin injection is completed, the injection valve 31 is closed and the internal feedback screw 23 is continuously rotated for 2 to 3 seconds, so that the filled molten resin M ′ is fed forward of the screw. The numerical values of P3 and front resin pressure P4 are increasing.

  Further, in the high shearing process, when the screw rotation speed is 500 to 3000 rpm (high speed rotation), the front resin pressure P4 reaches the peak value (front peak value Pa) immediately after the start of the high shear, The rear resin pressure P5 reaches the peak value (rear peak value Pb) with a delay from the front peak value Pa. Further, the behavior in which the time difference occurs between the front peak value Pa and the rear peak value Pb in this way indicates that the feedback of the molten resin M ′ is started by the internal feedback screw 23. Further, at the time of high shear (at high speed rotation), the waveforms of the torque P3, the front resin pressure P4, and the rear resin pressure P5 become a stable curve waveform that smoothly decreases. Further, it was confirmed that the waveforms of torque P3, front resin pressure P4, and rear resin pressure P5 as shown in FIG. It was.

  And the blend material manufactured by the high shear method of a present Example was transparent and favorable. Therefore, by providing the resin transfer step in step S4 shown in FIG. 6 and increasing the front resin pressure P4 in front of the screw, the molten resin M ′ kneaded by the internal feedback screw 23 immediately after the start of high shear. Is stabilized, and the waveforms of torque P3, front resin pressure P4, and rear resin pressure P5 are stabilized, which confirms that a high-quality blend material can be manufactured.

The embodiment of the high shear method using the high shear device according to the present invention has been described above. However, the present invention is not limited to the above embodiment, and can be appropriately changed without departing from the scope of the present invention. is there.
For example, in this embodiment, the resin transfer process time after the resin injection from the plasticizing unit 10 to the heating cylinder 21 of the high shear unit 20 is set to 2 to 3 seconds. This transfer time is an internal feedback screw. It can be appropriately changed according to conditions such as the number of rotations.
In addition, the configurations of the plasticizing unit 10 and the high shear unit 20, for example, the configurations and dimensions of the heating cylinders 11 and 21, the plasticizing screw 12, and the internal feedback screw 23 are limited to the present embodiment. And can be set as appropriate.

1 High shear device 10 Plasticizing unit (plasticizing part)
11 Heating cylinder of plasticizing unit 12 Plasticizing screw 20 High shear unit (high shear part)
21 Heating cylinder of high shear unit 23 Internal feedback screw (high shear screw)
231 Return hole 231a Inflow port 231b Discharge port 31 Injection valve 32 Discharge valve 33 Resin pressure sensor 33A Front resin pressure sensor 33B Rear resin pressure sensor 34, 34A to 34D Temperature sensor M Resin (material)
M 'Molten resin (material)

Claims (1)

By kneading while applying high shear stress, a high shear device was used to disperse and mix the internal structure of incompatible polymer blend, polymer / filler, and polymer blend / filler materials at the nano level. A high shear method,
In a plasticizing part for plasticizing and melting the material, a step of injecting the melted material into a heating cylinder of a high shearing part equipped with a high shearing screw;
Rotating the high shear screw by low-speed rotation after the injection step, and transferring the material in the heating cylinder to the feed side of the high shear screw for a predetermined time to increase the material pressure in front of the high shear screw ;
After said transfer step, a step of kneading giving high shear stress in the material of the high shear screw by a high speed faster than the low speed,
A high shearing method using a high shearing device characterized by comprising:

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